Trailer attached jack



y 1953 c; J. W GNER 2,638,315

TRAILER ATTACHED JACK Filed Feb. 3, 1947' INVENTOR. 6/7/24 I! h/AG/VEAPatented May 12, 1953 'KETACHE'E were! numnvmenneedtsmich.

m plicationilbmary a, 194:, sci-none; ream :2 :Qhfims. 1(CL254M86!) Thisinvention relates generally (to insists and refers snore particularly todolly Itygpe ihoi'sts employed in connection with trailers onlysupporting the front =eni ls of the rtrfl-lers at the desired elevationtrom the ground, shut i901 als!) raising and lowering the coupler itoenable the latter to lbe assembled "and ,removed fir-om the tractor or#pu lling veiiiol-e.

ne of :the lohfiects mff this iinventtion is ttdl-improve generallydo'lly lhoists set :the above type by incorporating the several :parts:ztnererfi in :a strong, (durable assembly capable ref inning meadilyattached ito trailer couplers or different idesigns and having readilyioperable :mea'ns iior u-aismg and lowering the ooupler send red :thetrailer to which theihoistiissattached.

Another Pfieature of this vmventiimiis its provide the hoist assembly"with '8- conveniently located handle permanently ratta'chedito theassemlilv and movable to a retracted out-oftheawayiposition where iit isheld=unti 1mequived- A further rfeature of ithis imzention iis it!)lprovide a moist with :a master :andigronnd engaging wheel assemblyreadily iiremmzably :secured in place. i p 3 A still further object isto provide a hoist assemhlyywhevein the warieus parts thereof-rareprotected from the weather and are sealed against the entrance of dirt,'du'st'or other foreign matter. i

The foregoing as .well .as .other .nhjects will he made morezapparent.as this :description pr'oceeds, especially .when considered inconnection with lthe accompanying drawing, wherein-'2 Figure "1. :isaside elevatinnal of :a type hoist embodying .the ieatimes l'o'f thisinvention;',. v

Figure 2 is a vertical sectional view through the hoist takensubstantially on the line 2-2 of Figure 1;

Figure 3 is an enlarged elevational view partly in section showin theoperating handle; and

Figure 4 is a sectional view taken on the line 4-4 of Figure 1.

The dolly type hoist forming thesubject matter of this invention isparticularly adapted for use in connection with trailers for not onlysupporting the front end of the trailer at the desired elevationrelative to the ground, but for also raising and lowering the front endof the trailer to enable readily attaching the trailer coupling to andremoving the same from the tractor or pulling vehicle.

With the above in view, reference is now made more in detail to thedrawing, wherein it will be 2 noted that the .reierence numeral 10indicates a ddllyitype hoist assembly comprising :inner and outerital'escnpicaliy iengaging tubes 1! :and '12 respectively. The tunes areslidahle relative to 'ronezanother :in itheilii'ieutlon-df theirlengths, and the inner tube :I l .iprojects downwardly from the lowerlendef the tube 4.2. The hoist assembly l0 is adapted to'cbevremovablyclamped to .a coupling :(notzshowni) with-thetubing-.extendingiverltica-lly Z'by 1a rolamp It. The clamp {is:comprises a ltopiplate "M and a ibottomplate 1 5 spaced irozn The "topplate each ather axially of the tube. M as welded 1"01 otherwise:fixedly secured to :the outer tube 112,21'ld the bottom :plate ismounted "ion the "router dsube M 01 sliding movement to- 7 "The thumbscrew 21B is adapted to firic'tionally and :sliding the :collar tfi offof :the lower end :of

' the tube :M

Thleiioint l-hetween the =-eollar is and inner tube II is shielded strumthe entrance 'of Water and rforei gn matter :by a ring 119. "The ring H9is.

secured entire-tube -,H aboveithercoilar Hand is provided with anenlarged portion at the lower end for freely receiving the upper end ofthe collar 16.. The lower end of the collar is welded or otherwisesecured to a disc 20 having a depending marginal fiange 2i and having acentral opening 22 therethrough.

A bracket 23 is positioned below the disc, and is provided with a topwall 24 having a central opening 25 therethrough registering with theopening 22. A double-headed pin 26 extends through the aligned openingsand serves to pivotally connect the bracket 23 to the disc 20. In thepresent instance, the top wall 24 is formed to provide an annular groove21 concentric with the axis of pivotal movement of the bracket andadapted to retain a series of balls 28. The balls 28 also engage thebottom surface of the disc 20 and serve as an antifriction bearing forthe bracket 23.

the caster wheels-assembly may the-readily removed from the 1 hoist hymerely releasing the "thumb screw 18- 1 idnoxn irrational =eentaot withthe inner tube 1:!

The bracket 23 is also provided with laterally spaced forwardlyextending arms 29 having aligned openings through the free end portionsthereof for receiving the wheel axle 30. The axle 30 forms a support forthe caster wheel 3|, which is of sufiicient width to minimize thetendency for the same to sink into the ground, when the weight for theforward end of the trailer is supported thereby,

The upper end of the outer tube l2 extends beyond the corresponding endof the inner tube II and is closed by a disc 32. A nut 33 is welded orotherwise fixed into the upper end of the inner tube H, and a screw 34is threaded into the nut; The upper end of the screw project through ain I washer 35 33. The washer 35 is spaced below the disc 32 and athrust bearing 38 is supported therebe-' tween.

It follows from the foregoing that rotation of the screw 34 in onedirection effects a relative sliding movement of the tubes to increasethe effective length of the hoist and rotation of the relative to thetube 12 and is supported on a,

thrust bearing 41 supported in the tube 12 above the disc 32. The upperend of the screw 34 extends into the channel and is secured to opposite.

walls of the channel by a pin 4|.

The crank handle comprises a shank 42 and rotatable grip 43 extendinglaterally outwardly from one end of the shank. The other end portion ofthe shank 42 extends into the channelshaped bracket 38, and is pivotedto opposite side walls of the bracket by a pin 44. The construction issuch as to permit swinging movement of I the handle from the operativeor full line position thereof shown in Figure 3 to the inoperative ordotted line position shown in the same figure of the drawing. When thecrank handle is in its full line position, the shank 42 extends par- Yallel to the bracket 38 between the flanges on the latter and cooperateswith the bracket to enable rotation of the screw 34. On the other hand,

when the crank handle .is in its inoperative position, the shank 42extends along one side of the hoist where it is out of the way.

In accordance with this invention, the crank handle is releasablylatched in both its operative and inoperative positions. As shown inFigure 4 of the drawings, one flange of the channelshaped bracket isfashioned to form two indentations or detents 45 and 46. The relativepositions of the detents is such that when the handle is moved to itsoperative position, the detent 46 engages the bottom portion of theshank 39 to frictionall hold the shank against downward swingingmovement. However, the dimension of the detent 48 is such as to permitforcibly swinging the handle past the same to the inoperative positionthereof. The detent 45 is positioned to cooperate with the upper portionof the shank to hold the latter in its inoperative position against oradjacent to the outer tube 12 of the hoist. Thus while provision is madeto retain the operating handle in an out-of-the-way position when not inuse, nevertheless, the construction is such as to permit the handle tobe readily located in its operating position when it is desired to manipu1atethe hoist.

What I claim as my invention is:

1. In a hoist to be mounted upon a trailer frame comprisingtelescopically engaged inner and outer tubes, the outer tube forming ahollow post extending upward above its attachment to the trailerv frame,aground engaging member at the lower end of the inner tube and a screwof the aforesaid positions thereof.

CARL J. WAGNER. References Cited in the file of this patent UNITEDSTATES PATENTS Number Name Date 1,076,555 Dillon Oct. 21, 19131,191,855. Tuszka July 18, 1916 1,453,989 Norlund May 1, 1923 1,597,347Fildes Aug. 24, 1926 1,802,840 Schneider Apr. 28, 1931 2,348,869 WagnerMay 16, 1944 Seyferth Sept. 19, 1950

